IGCSE Biology Paper-4: Specimen Questions with Answers 237 - 240 of 279

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Passage

Deforestation occurs in many parts of the world.

Question 237 (3 of 4 Based on Passage)

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Forests are important and complex ecosystems. State two likely effects of deforestation on the forest ecosystem.

Explanation

Effects of Deforestation

  • Flooding
  • Soil erosion
  • Climate change
  • Desertification
  • Fewer crops
  • Increased greenhouse gases
  • Harm wild life
  • Destroy habitat
  • Affect water cycle
  • Leave scars on environment.

Question 238 (4 of 4 Based on Passage)

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State two reasons why deforestation is carried out.

Explanation

Reasons Deforestation is Performed

Agriculture, Unsustainable forest management, Mining, Infrastructure projects etc.

Passage

The diagram shows a section through a leaf.

Vascular Bundle

Question 239 (1 of 6 Based on Passage)

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The upper layers of a leaf are transparent. Suggest an advantage to a plant of this feature.

Explanation

There is a single layer of upper epidermal cells containing few or no chloroplasts. The cells are quite transparent and permit most of the light that strikes them to pass through to the underlying cells.

Question 240 (2 of 6 Based on Passage)

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Short Answer▾

On the diagram, label a stoma, the cuticle, and a vascular bundle. Use label lines and the words “stoma” , “chloroplast” and “vascular bundle” on the diagram.

Explanation

Vascular Bundle
Mesophyll Cells

Developed by: